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com.google.gwt.http.client</FONT>
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Interface RequestCallback</H2>
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<DL>
<DT><PRE>public interface <B>RequestCallback</B></DL>
</PRE>

<P>
The primary interface a caller must implement to receive a response to a
 <A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client"><CODE>Request</CODE></A>.
 
 <h3>Required Module</h3>
 Modules that use this interface should inherit
 <code>com.google.gwt.http.HTTP</code>.
 
 <blockquote><pre>&lt;module&gt;
  &lt;!-- other inherited modules, such as com.google.gwt.user.User --&gt;
  &lt;inherits name="com.google.gwt.http.HTTP"/&gt;
  &lt;!-- additional module settings --&gt;
&lt;/module&gt;
</pre></blockquote>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/gwt/http/client/RequestCallback.html#onError(com.google.gwt.http.client.Request, java.lang.Throwable)">onError</A></B>(<A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client">Request</A>&nbsp;request,
        java.lang.Throwable&nbsp;exception)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called when a <A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client"><CODE>Request</CODE></A> does not complete
 normally.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/gwt/http/client/RequestCallback.html#onResponseReceived(com.google.gwt.http.client.Request, com.google.gwt.http.client.Response)">onResponseReceived</A></B>(<A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client">Request</A>&nbsp;request,
                   <A HREF="../../../../../com/google/gwt/http/client/Response.html" title="class in com.google.gwt.http.client">Response</A>&nbsp;response)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called when a pending <A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client"><CODE>Request</CODE></A> completes
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<A NAME="onResponseReceived(com.google.gwt.http.client.Request, com.google.gwt.http.client.Response)"><!-- --></A><H3>
onResponseReceived</H3>
<PRE>
void <B>onResponseReceived</B>(<A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client">Request</A>&nbsp;request,
                        <A HREF="../../../../../com/google/gwt/http/client/Response.html" title="class in com.google.gwt.http.client">Response</A>&nbsp;response)</PRE>
<DL>
<DD>Called when a pending <A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client"><CODE>Request</CODE></A> completes
 normally.  Note this method is called even when the status code of the 
 HTTP response is not "OK", 200.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>request</CODE> - the object that generated this event<DD><CODE>response</CODE> - an instance of the
        <A HREF="../../../../../com/google/gwt/http/client/Response.html" title="class in com.google.gwt.http.client"><CODE>Response</CODE></A> class</DL>
</DD>
</DL>
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<A NAME="onError(com.google.gwt.http.client.Request, java.lang.Throwable)"><!-- --></A><H3>
onError</H3>
<PRE>
void <B>onError</B>(<A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client">Request</A>&nbsp;request,
             java.lang.Throwable&nbsp;exception)</PRE>
<DL>
<DD>Called when a <A HREF="../../../../../com/google/gwt/http/client/Request.html" title="class in com.google.gwt.http.client"><CODE>Request</CODE></A> does not complete
 normally.  A <A HREF="../../../../../com/google/gwt/http/client/RequestTimeoutException.html" title="class in com.google.gwt.http.client"><CODE>RequestTimeoutException</CODE></A> is
 one example of the type of error that a request may encounter.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>request</CODE> - the request object which has experienced the error condition<DD><CODE>exception</CODE> - the error that was encountered</DL>
</DD>
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